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PPE vs. PAI

Both PPE and PAI are thermoplastics. There are 19 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is PPE and the bottom bar is PAI.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 2.3
4.0 to 8.3
Elongation at Break, % 30
3.0 to 12
Flexural Strength, MPa 75
160 to 320
Tensile Strength: Ultimate (UTS), MPa 55
100 to 180

Thermal Properties

Glass Transition Temperature, °C 85
280
Heat Deflection Temperature At 1.82 MPa (264 psi), °C 120
280
Maximum Temperature: Autoignition, °C 430
530
Maximum Temperature: Mechanical, °C 90
260
Specific Heat Capacity, J/kg-K 1200
910 to 1000
Thermal Conductivity, W/m-K 0.22
0.26 to 0.53
Thermal Expansion, µm/m-K 90
15 to 34

Otherwise Unclassified Properties

Density, g/cm3 1.1
1.4 to 1.6
Water Absorption After 24 Hours, % 0.23
0.3 to 0.4

Common Calculations

Stiffness to Weight: Axial, points 1.2
1.6 to 3.2
Stiffness to Weight: Bending, points 42
38 to 47
Strength to Weight: Axial, points 14
19 to 34
Strength to Weight: Bending, points 30
33 to 49
Thermal Diffusivity, mm2/s 0.17
0.16 to 0.41
Thermal Shock Resistance, points 19
48 to 110